Furnace Installation

How Much Space Should I Leave Open Around My Furnace?

Natural gas furnaces need sufficient space and airflow to run correctly.

Your furnace can get too hot if it doesn’t have enough space. It also makes it hard for our technicians to complete furnace repair.

Annual furnace maintenance is essential to keep your system running trouble-free. A regularly serviced furnace may heat more efficiently, which could decrease your utility costs.

Related: How Does Furnace Maintenance Impact the Energy Efficiency of Your Home?

Maintenance often helps us spot issues before they begin. This could help reduce future repair costs and likely extend the life of your system.

So how much room should your furnace really have?

How Much Space Does My Furnace Need?

If you’re finishing your basement or enclosing your furnace room, you should consult manufacturer specifications and Marshfield statutes for clearance rules.

As a general suggestion, your system should be 30 inches away from furnace room walls on all sides. This allows our service professionals to easily repair it.

You also need to make sure the area has enough airflow and ventilation, especially if you have an outdated furnace with a metal flue.

Related: Furnace Service or Furnace Replacement: What to Consider

This model of furnace pulls combustion air from the surrounding space. If there’s not enough air, hazardous gas fumes and deadly carbon monoxide could back draft into your home.

If your furnace is positioned in a small room with a gas water heater, you may need to put in extra openings. This could include a fully louvered door or vents in the walls.

Not sure if your furnace or water heater has proper ventilation? We can help!

Contact us

You don’t need to consider airflow and ventilation as much if you have a modern, high-efficiency furnace with PVC piping. Your unit uses one pipe as an exhaust vent and the other to pull in air.

Keep Combustible Materials Away from Your Furnace

Although furnace rooms function as laundry and storage space, you should keep yours free of things that could be fire hazards.

This includes:

  • Clotheslines
  • Cleaning or laundry products
  • Gasoline, paint or paint thinner
  • Rags and papers
  • Wood scraps and sawdust
  • Used filters

If you have a cat, situate your litter box elsewhere. Cat urine contains ammonia, which could corrode your furnace’s heat exchanger. Plus, the furnace could move the unpleasant odors all over your home.

You should also frequently clean around your furnace to stop dust from building up.

Related: Is it Time for Furnace Service or Replacement?

Request Expert Furnace Service 

Whether you want furnace replacement or annual maintenance in Marshfield, House of Heating Incorporated can expertly meet your needs. Our highly trained technicians can repair any furnace model or brand.

Call us at 715-384-3163 or use our online scheduler to get an appointment today.

Back To Blog